Incandescent-lamp suspension.



H. R. SARGENT. INIGANDESGENT LAMP SUSPENSION.

APPLICATION FILED NOV. 23, 1912.

Patented Feb. 24, 1914.

HAM ttorney.

UNITED STATES PATENT OFFICE.

HOWARD R. SARGENT: OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OE NEW YORK.

INCANDESCENT-LAMP SUSPENSION.

nos'msr.

Specification of Letters Patent.

Patented Feb. 24, 1914.

Application filed November 23, 1912. Serial No. 733,020.

To all whom it may concern Be it known that I, HOWARD R. SARGENT, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Incandescent-Lamp Suspension, of which the following is a specification.

The present. invention relates to electric lighting and more especially to supporting means for incandescent lamps.

In certain types of buildings, such as shops and factories, it is customaryto string supporting catenary .wires or cables in horizont-al planes beneath the roof trusses and thread the lamp holding means thereon before fastening the ends of the catenary wires or cables. This arrangement enables the lamps to be positioned at the most advantageous level and is easily and cheaply installed, but it is open to the objection, as heretofore used, that additional or renewal of lamp receptacles r rosettes could not be threaded upon the'cate-nary wires or cables without disconnection of the ends of the latter.

The object of my invention is to provide an improved lamp holding means which may be readily applied to or removed from installed catenary suspension wires or cables.

While I have restricted my illustration and description to a lamp receptacle, it is to be understood.that the invention is applicable to other forms of lamp supporting meansu In the accompanying drawing, Figure 1 is a side elevation of catenary wires or cables supporting three lamp holding means with lamps and conducting wires in position; Fig. Qis a side elevat-ion of a lamp receptacle with parts in section; and Fig. 3 is a bottom plan of the base block. v

The base consists of a block 1 and cap 2; both made of porcelain or other suitable insulating material. The block 1 has transverse grooves B near each end of its lower surface and offset from these" grooves are recesses 4, in which are secured binding posts 5 for engaging the-conductor wires 6. These bindingposts are made L-shaped and at their inner ofl'set ends have clamping screws 7 for mechanically, and electrically connecting the lamp contacts 8 and 9 of the cap piece 2 through flat strips 10 and 11 seated in recesses in the rear of the cap 1- and secured by screws, and having their outer ends provided with open slots for readv engagement and disengagement with thescrews i. The upper surface of the base block 1 is provided with positioning lugs 1'3 and in the central portion of the block are two countersunk transverse holes 13 for the reception of screws 14.

The means for connecting the lamp supporting base to catenary suspension wires or cables 15 consists of a cleat ll; of substnntially the same size as the base having on its lower surface two transverse grooves 17 adapted to cooperate with the positioning lugs 12 of the base block 1 and three trans; verse V-shaped grooves 18 for the reception of the catenary wires 15 and extending through the central portion of thecleal 16 are screw holes corresponding to the holes 13 in base block 1 and in the upper surface of the cleat 1G is a recess 19 in which is seated a plate 20 provided with threaded apertures for engagement with the screws 14.

\Vhen it is desired to apply one of my lamp suspensions to catenary wires, thecleat 16 is placed on the upper side and the base block 1 on the under side of the wires and the screws 14 forced home. The conductor wires 6 are then connected to the binding posts 5 and the base cap 2 applied in the usual way.

It. will be noted that all current'carrying parts are located on the lower surface of the base, leaving the upper surface entirely free therefrom so that danger of current'reaching the eatenary wires is overcome, and that each lamp suspension is'positively held in place when the cleat has been securedin clamped position.

I do not desire torestrict myself to the particular form or arrangement of parts shown, since it is apparent that they may be changed and modified without departing from my invention.

What I claim as new and desire to secure by Letters Patent of the United States, is,-

1. The combination of an insulating base.- block having current-carrying means located beneath and free of its upper surface, a cap connected to the lower side of said block and provided with branch circuit contacts, and a suspension cleat detachably secured to the upper surface of said base block.

2. The coziihination of an insulating base block, current-carrying means located on the l-lO , V--shaped grdov'es,

' means on said base block and said cleat, and

means for clamping said base block and cleat together.

3. The Combination of an insulatingbase block, current-carrying means located on the lower portion of said block, a cap connected to. the lower side of said block and provided with branch circuit contacts, a suspension cleatprovided w th one or more transverse and means for clamping said cleat to the upper side of said-base block.-

transverse grooves in its lower surface,

4. The combination of abzrse block havinga pair of binding posts located near 0pposite ends of its lower surface, a cap detaohably connected to the lower surface of said blockya suspension cleatvprovided with:

an screws passing through said base and said cleat to clamp them together.

In witness whereof,- I have hereunto set myhand this 20th day of November, 1912.

.HOWARD R. SARGENT.

\Vitnesses:

HELEN ORFORD, BENJAMIN B. HULL.

Copies of this patent maybe obtained tor-five cents each, by addressing the Commissioner ofdPatent's.

'- Washington, D. 0. i 

